How to implement onBackPressed's alternative way/method in Fragment?

when i click 3 tab one by one then if i click back button then not directly back/finish screen, but after multiple times click back button then finish screen.

my code:

public class AddToListFragment extends Fragment { public TabHost tabHost; public View rootView;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    rootView = inflater.inflate(R.layout.fragment_tap_host, container,
            false);
    tabHost = (TabHost) rootView.findViewById(R.id.tabHost);
    tabHost.setup();
    // SMSReaderFragment v = new SMSReaderFragment();
    // getFragmentManager().beginTransaction()
    // .replace(R.id.tab1, v, "YOUR_TARGET_FRAGMENT_TAG")
    // .addToBackStack("YOUR_SOURCE_FRAGMENT_TAG").commit();
    //
    //
    // CallReaderFragment v1 = new CallReaderFragment();
    // getFragmentManager().beginTransaction()
    // .replace(R.id.tab2, v1, "YOUR_TARGET_FRAGMENT_TAG")
    // .addToBackStack("YOUR_SOURCE_FRAGMENT_TAG").commit();

    // // first tab
    // TabSpec spec1 = tabHost.newTabSpec("spec1");
    // spec1.setIndicator("",
    // getResources().getDrawable(R.drawable.ic_action_copy));
    // Intent toABC = new Intent(getActivity(), AddBlackList.class);
    // spec1.setContent(toABC);
    //
    // TabSpec spec2 = tabHost.newTabSpec("specee");
    // spec2.setIndicator("",
    // getResources().getDrawable(R.drawable.ic_launcher));
    // Intent toABCq = new Intent(getActivity(), AddWhiteList.class);
    // spec1.setContent(toABCq);

    TabHost.TabSpec spec1, spec2, spec3;

    spec1 = tabHost.newTabSpec("spec1");
    spec1.setContent(R.id.tab1);
    // how to open ABC.java file
    spec1.setIndicator("Blacklist");
    tabHost.addTab(spec1);

    spec2 = tabHost.newTabSpec("spec2");
    spec2.setContent(R.id.tab2);
    spec2.setIndicator("Whitelist");
    tabHost.addTab(spec2);

    spec3 = tabHost.newTabSpec("spec3");
    spec3.setContent(R.id.tab3);
    spec3.setIndicator("Manual");
    tabHost.addTab(spec3);

    Fragment blacklist = new AddBlackListFragment();
    getFragmentManager().beginTransaction()
            .replace(R.id.tab1, blacklist, "YOUR_TARGET_FRAGMENT_TAG")
            .addToBackStack("YOUR_SOURCE_FRAGMENT_TAG").commit();

    tabHost.setOnTabChangedListener(new OnTabChangeListener() {

        @Override
        public void onTabChanged(String tabId) {
            if (tabId.equals("spec1")) {
                Fragment blacklist = new AddBlackListFragment();
                getFragmentManager()
                        .beginTransaction()
                        .replace(R.id.tab1, blacklist,
                                "YOUR_TARGET_FRAGMENT_TAG")
                        .addToBackStack("YOUR_SOURCE_FRAGMENT_TAG")
                        .commit();
            } else if (tabId.equals("spec2")) {
                Fragment whitelist = new AddWhiteListFragment();
                getFragmentManager()
                        .beginTransaction()
                        .replace(R.id.tab2, whitelist,
                                "YOUR_TARGET_FRAGMENT_TAG")
                        .addToBackStack("YOUR_SOURCE_FRAGMENT_TAG")
                        .commit();

            } else if (tabId.equals("spec3")) {
                Fragment whitelist = new AddManualFragment();
                getFragmentManager()
                        .beginTransaction()
                        .replace(R.id.tab3, whitelist,
                                "YOUR_TARGET_FRAGMENT_TAG")
                        .addToBackStack("YOUR_SOURCE_FRAGMENT_TAG")
                        .commit();
            } else {

            }

        }
    });

    return rootView;
}

@Override
public void onDetach() {
    super.onDetach();
    Toast.makeText(getActivity(), "Helooo", Toast.LENGTH_LONG).show();
}

@Override
public void onDestroyView() {
    super.onDestroyView();
    rootView = null;
    Toast.makeText(getActivity(), "hello", Toast.LENGTH_LONG).show();
}

}

I want to finish directly when click back Button. how to implements it. please help me.